250+ Node Js MCQ With Online Practice Test

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Node.js, often referred to as simply "Node," is a powerful open-source runtime environment that allows developers to execute JavaScript code outside of web browsers. It is designed for building scalable and efficient network applications, particularly on the server side. Node.js leverages a non-blocking, event-driven architecture, making it ideal for handling asynchronous operations and real-time applications. With its vast ecosystem of packages and modules available through npm (Node Package Manager), Node.js has become a popular choice for web development, microservices, APIs, and more, enabling developers to create high-performance applications with ease.

21. What is a Node.js module?

Answer: A JavaScript file containing functions and variables

22. Which built-in Node.js module provides functions for working with file systems?

Answer: fs

23. How do you include a module in a Node.js file?

Answer: By using the require function

24. What is the purpose of the Node Package Manager (npm)?

Answer: To install, manage, and share JavaScript packages and dependencies

25. What is the default location where globally installed npm packages are stored?

Answer: /usr/local/lib/node_modules

26. Which npm command is used to install a package locally in a Node.js project?

Answer: npm install

27. What is the purpose of the package.json file in a Node.js project?

Answer: To specify project metadata, dependencies, and scripts

28. How can you run a script defined in the package.json file using npm?

Answer: By using the npm run command followed by the script's name

29. What is a common use case for npm scripts in a Node.js project?

Answer: Running unit tests, build processes, or application start scripts

30. What does the npm install --save command do when installing a package?

Answer: It installs the package as a production dependency in the package.json file.
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